code: def test_pointset_basic():
      # create empty pointset
      pset = pv.PointSet()
      assert pset.n_points == 0
      assert pset.n_cells == 0
      assert "PointSet" in str(pset)
      assert "PointSet" in repr(pset)
      assert pset.area == 0
      assert pset.volume == 0
  
imports: import numpy
  import pytest
  import vtk
  import pyvista
  from pyvista.core.errors import PointSetCellOperationError, PointSetDimensionReductionError, PointSetNotSupported
label_desc: Use image node_id 1 for calling a global function with example usage: test_pointset_basic() without return types